Release 4.15 kernel/utsname_sysctl.c
/*
* Copyright (C) 2007
*
* Author: Eric Biederman <ebiederm@xmision.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*/
#include <linux/export.h>
#include <linux/uts.h>
#include <linux/utsname.h>
#include <linux/sysctl.h>
#include <linux/wait.h>
#include <linux/rwsem.h>
#ifdef CONFIG_PROC_SYSCTL
static void *get_uts(struct ctl_table *table, int write)
{
char *which = table->data;
struct uts_namespace *uts_ns;
uts_ns = current->nsproxy->uts_ns;
which = (which - (char *)&init_uts_ns) + (char *)uts_ns;
if (!write)
down_read(&uts_sem);
else
down_write(&uts_sem);
return which;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric W. Biedermann | 43 | 56.58% | 1 | 33.33% |
| Pavel Emelyanov | 32 | 42.11% | 1 | 33.33% |
| Joe Perches | 1 | 1.32% | 1 | 33.33% |
| Total | 76 | 100.00% | 3 | 100.00% |
static void put_uts(struct ctl_table *table, int write, void *which)
{
if (!write)
up_read(&uts_sem);
else
up_write(&uts_sem);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric W. Biedermann | 35 | 97.22% | 1 | 50.00% |
| Joe Perches | 1 | 2.78% | 1 | 50.00% |
| Total | 36 | 100.00% | 2 | 100.00% |
/*
* Special case of dostring for the UTS structure. This has locks
* to observe. Should this be in kernel/sys.c ????
*/
static int proc_do_uts_string(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table uts_table;
int r;
memcpy(&uts_table, table, sizeof(uts_table));
uts_table.data = get_uts(table, write);
r = proc_dostring(&uts_table, write, buffer, lenp, ppos);
put_uts(table, write, uts_table.data);
if (write)
proc_sys_poll_notify(table->poll);
return r;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric W. Biedermann | 87 | 87.88% | 1 | 33.33% |
| Lucas De Marchi | 11 | 11.11% | 1 | 33.33% |
| Joe Perches | 1 | 1.01% | 1 | 33.33% |
| Total | 99 | 100.00% | 3 | 100.00% |
#else
#define proc_do_uts_string NULL
#endif
static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);
static struct ctl_table uts_kern_table[] = {
{
.procname = "ostype",
.data = init_uts_ns.name.sysname,
.maxlen = sizeof(init_uts_ns.name.sysname),
.mode = 0444,
.proc_handler = proc_do_uts_string,
},
{
.procname = "osrelease",
.data = init_uts_ns.name.release,
.maxlen = sizeof(init_uts_ns.name.release),
.mode = 0444,
.proc_handler = proc_do_uts_string,
},
{
.procname = "version",
.data = init_uts_ns.name.version,
.maxlen = sizeof(init_uts_ns.name.version),
.mode = 0444,
.proc_handler = proc_do_uts_string,
},
{
.procname = "hostname",
.data = init_uts_ns.name.nodename,
.maxlen = sizeof(init_uts_ns.name.nodename),
.mode = 0644,
.proc_handler = proc_do_uts_string,
.poll = &hostname_poll,
},
{
.procname = "domainname",
.data = init_uts_ns.name.domainname,
.maxlen = sizeof(init_uts_ns.name.domainname),
.mode = 0644,
.proc_handler = proc_do_uts_string,
.poll = &domainname_poll,
},
{}
};
static struct ctl_table uts_root_table[] = {
{
.procname = "kernel",
.mode = 0555,
.child = uts_kern_table,
},
{}
};
#ifdef CONFIG_PROC_SYSCTL
/*
* Notify userspace about a change in a certain entry of uts_kern_table,
* identified by the parameter proc.
*/
void uts_proc_notify(enum uts_proc proc)
{
struct ctl_table *table = &uts_kern_table[proc];
proc_sys_poll_notify(table->poll);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lucas De Marchi | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
#endif
static int __init utsname_sysctl_init(void)
{
register_sysctl_table(uts_root_table);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric W. Biedermann | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
device_initcall(utsname_sysctl_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Eric W. Biedermann | 434 | 79.20% | 1 | 12.50% |
| Lucas De Marchi | 71 | 12.96% | 1 | 12.50% |
| Pavel Emelyanov | 32 | 5.84% | 1 | 12.50% |
| Yuanhan Liu | 3 | 0.55% | 1 | 12.50% |
| Ingo Molnar | 3 | 0.55% | 1 | 12.50% |
| Joe Perches | 3 | 0.55% | 1 | 12.50% |
| Fabian Frederick | 1 | 0.18% | 1 | 12.50% |
| Paul Gortmaker | 1 | 0.18% | 1 | 12.50% |
| Total | 548 | 100.00% | 8 | 100.00% |
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